scholarly journals Large-Scale Structure and the Sustenance Mechanism in Turbulent Poiseuille Flow at Low Reynolds Number(Fluids Engineering)

2010 ◽  
Vol 76 (771) ◽  
pp. 1773-1778 ◽  
Author(s):  
Koji FUKUDOME ◽  
Oaki IIDA ◽  
Yasutaka NAGANO
Keyword(s):  
Reynolds Number ◽  
Poiseuille Flow ◽  
Large Scale ◽  
Low Reynolds Number ◽  
Large Scale Structure ◽  
Scale Structure ◽  
Low Reynolds

Effect of Large Scale 3-D Structures on the Flow Around a Heated Cylinder at Low Reynolds Number

2018 ◽  
Vol 101 (2) ◽  
pp. 553-577 ◽  
Author(s):  
Stefano Rolfo ◽  
Konstantinos Kopsidas ◽  
Shahnurriman A. Rahman ◽  
Charles Moulinec ◽  
David R. Emerson
Keyword(s):  
Reynolds Number ◽  
Large Scale ◽  
Low Reynolds Number ◽  
Heated Cylinder ◽  
Low Reynolds

Numerical Design and Study of a MEMS-Based Micro Turbine

2005 ◽  
Author(s):  
Tatsuo Onishi ◽  
Ste´phane Burguburu ◽  
Olivier Dessornes ◽  
Yves Ribaud
Keyword(s):  
Heat Transfer ◽  
Reynolds Number ◽  
Skin Friction ◽  
Large Scale ◽  
Low Reynolds Number ◽  
Turbine Blades ◽  
Three Dimensional ◽  
Navier Stokes ◽  
Low Reynolds ◽  
Micro Turbine

A full three dimensional Navier-Stokes solver elsA developed by ONERA is used to design and study the aerothermodynamics of a MEMS-based micro turbine. This work is performed in the framework of micro turbomachinery project at ONERA. A few millimeter scale micro turbine is operated in a low Reynolds number regime (Re = 5,000∼50,000), which implies a more important influence of skin friction and heat transfer than the conventional large-scale gas turbine. The 2D geometry constraints due to the limitation of fabrication technology also distinguish the aerothermodynamic characteristics of a micro turbine from that of conventional turbomachinery. Thus, for the foundation of aerothermodynamic design of micro turbomachinery, understanding of low Reynolds number effects on the performance is required and then the design of the turbine geometry can be optimized. In this study, aero-thermodynamic effects at low Reynolds number and different stator/rotor configurations are examined with a prescribed wall temperature. Losses due to heat transfer to walls and skin friction are estimated and their effects on the operating performance are discussed. Power delivery to turbine blades is checked and found satisfactory to give the objective design value of more than 100W. The effects of turbine exhaust geometry and the number of blades on turbine performance are also discussed.

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